Guidelines on Use of Native Plants for Gardening

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1 Guidelines on Use of Native Plants for Gardening Contents: Introduction Guidelines Oregon Ecoregions Where to Obtain Native Plants Benefits Websites References Pacific Northwest natives can satisfy aesthetically, practically, and ecologically. Grow them and enjoy them. Whether you go native all the way or mix natives with plants from other lands, you can expect pleasure from the beauty that natives can bring to your garden. --Art Kruckeberg, from Gardening with Native Plants of the Pacific Northwest (1996) Introduction Have you walked through a meadow and been impressed with the colorful array of native wildflowers? Do you enjoy the beauty of natural areas that you visit in Oregon? Do you like watching birds or butterflies use plants for the different resources they provide? Are you interested in protecting or enhancing natural areas in your community? If you answered 'yes' to any of these questions, you may also be interested in incorporating native plants into your home garden. Growing natives in your garden is a great way to gain familiarity with native plants. In addition, using native plants in your garden is a logical extension of your concern for preserving some of Oregon's natural heritage. In your garden, you can provide habitat for native plants and the great array of animals and other organisms that depend on them. The Native Plant Society of Oregon (NPSO) encourages you to grow Oregon native plants in your garden. However, while there are several hundred plants native to Oregon that make good garden plants, not all are native to your area of Oregon. The purpose of this document is to outline

2 guidelines that the NPSO hopes you will follow to maximize the ecological and practical benefits of native plant gardening. Guidelines for gardening with native plants By following these guidelines, you will be able to successfully grow natives in your garden and enjoy the beauty and ecological benefits of native plants. 1. Use plants that are native to your ecoregion. What is an ecoregion? Ecoregions are areas that are relatively uniform in soils, vegetation, climate, geology, and wildlife. Ten ecoregions are recognized in Oregon. Refer to the map on the Table of Contents page. Plants within your ecoregion are most likely to grow well in your garden. 2. Choose plants that grow well in the unique conditions in your garden. The particular conditions of soil type, soil moisture, and amount of sunlight may vary in different parts of your garden. You will want to select the right plants to fit the various conditions that may be present in your garden. For example, if your front yard gets full sun for most of the day, you would want to plant natives (from your ecoregion) that grow in sunny places. Local NPSO chapters may have lists of native plants in your ecoregion, along with descriptions of the conditions under which they grow best. In addition, you can consult numerous field guides and gardening books that describe suitable growing conditions for native plants. Consult the Bibliography at the end of this document for some of the references that are currently available. 3. Select plants that originated from as close to your home as possible. Plants that occur in your ecoregion and that originate close to your garden site are locally native. By using locally native plants, you will preserve the natural heritage of your community. In addition, you will have a higher probability of successfully establishing the plants than if you were to use plants that originated from far away. 4. Select healthy looking plants. Healthy looking plants exhibit vigorous growth, are not wilted, have good foliage color, and are free of insect damage and spots on the leaves. Healthy nursery plants will have a much better chance of growing well in your garden than unhealthy plants. But remember, once they are growing well in your garden, native plants may attract butterflies and other animals that depend on these plants for their own survival. Welcome these visitors! Attracting these animals to your garden is one of the many benefits of gardening with natives! 5. If you choose to not plant natives, avoid using invasive non-native plants. For lists of invasive, non-native plants, visit one of the web sites listed at the end of this document. 6. For best results, plant in the spring or fall. At other times of the year, plants will need greater amounts of attention (e.g., watering) in order to flourish. Remember that every plant you choose may not grow well. Have fun and experiment with different native plants from the ecoregion and microsite types appropriate for your particular garden.

3 Where do you get locally native plants? Once you have determined what locally native plants would grow well in your garden, you are left with another challenge: finding a place where you can obtain or purchase them. Fortunately, the demand for native plants is steadily increasing and many nurseries now specialize in native plants, while others carry a selection of natives along with non-native ornamentals. Here are a few tips on how to find locally native plants, and how you can encourage an increasing availability of native plants in the future: Contact local plant nurseries. Ask the staff if they have a selection of native plants. If they do, show your appreciation for this. Ask about the source of the plant material and the propagation method used by the nursery. Ideally, the plants would be propagated from source material (e.g., seeds or cuttings) within your ecoregion. See the NPSO policy on ethical propagation methods for a further discussion on propagation techniques. See the NPSO Chapters page to get contacts for your local chapter. Many NPSO members are active native plant gardeners, and know sources for locally native plants. Transplanting native plants from a natural habitat to your garden is discouraged because it can damage natural plant communities. In addition, state law forbids the collection of many plant species.

4 Benefits of gardening with locally native plants Once you have established locally native plants in your garden, there are numerous benefits you will reap. Examples are: 1. By using locally native plants in your garden, you help ensure habitat for plants and the animals that depend on them. For example, many of our native butterflies depend on a single native plant species during their caterpillar stage. 2. Native plants are attractive and beautiful. 3. Locally native plants are adapted to local soil and climate conditions, making many of them easier to maintain. 4. By using locally native plants, you reduce the risk of introducing invasive plants into your community. 5. By using locally native plants, rather than natives from elsewhere, the unique genetic makeup of locally native plants will not be altered. Websites Native Plants Native Plant Society of Washington The Berry Botanic Garden Invasive & Non-native Plants Noxious Weed Home Page, USDA References Bailey, Robert G Description of the ecoregions of the United States. Second edition. Miscellaneous publication Number 1391 (rev.). USDA Forest Service, Washington D.C., USA. 108 pages with separate map at 1:7,500,000. Bailey, Robert G Ecoregions map of North America: Explanatory note. Miscellaneous Publication Number USDA Forest Service, Washington, D.C., USA.. 10 pages with a separate map at 1:15,000,000. City of Portland Bureau of Planning Portland environmental handbook.

5 Kruckeberg, A.R Gardening with native plants of the Pacific Northwest. Second edition, revised and enlarged. University of Washington Press, Seattle, WA, USA. Omernik, J.M Ecoregions: a spatial framework for environmental management. In Biological Assessment and criteria: tools for water resource planning and decision making, edited by W.S. Davis and T.P. Simon. Pages Lewis Publishers, Boca Raton, Florida, USA. Pater, D.E., S.A. Bryce, T.D. Thorson, J. Kagan, C. Chappel, J.M. Omernik, S.H. Azevedo, and A.J. Woods Ecoregions of Western Washington and Oregon (2 sided color poster with map, descriptive text, summary tables, and photographs). Reston, VA, USA. U.S. Department of Interior, Geological Survey (map scale: 1:1,350,000. ISBN Pater, D.E., S. Bryce, T.D. Thorson, J. Kagan, C. Chappell, J. Omernik, S. Azevedo, A.J. Woods Ecological regions of North America: toward a common perspective. Commission for Environmental Cooperation, Montreal,Quebec, Canada. 71 pages. Rose, R., C.E. Chachulski, and D.L. Haase Propagation of Pacific Northwest native plants. Oregon State University Press, Corvallis, OR, USA. Wilson, M.V, D.E. Hibbs, and E.R. Alverson Native plants, native ecosystems, and native landscapes: an ecological definition of ÒnativeÓ will promote effective conservation and restoration.ó Kalmiopsis:13-17.